54388999 has 4 divisors (see below), whose sum is σ = 62158864. Its totient is φ = 46619136.

The previous prime is 54388993. The next prime is 54389009. The reversal of 54388999 is 99988345.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 54388999 - 2¹⁵ = 54356231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54388993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3884922 + ... + 3884935.

It is an arithmetic number, because the mean of its divisors is an integer number (15539716).

Almost surely, 2^54388999 is an apocalyptic number.

54388999 is a deficient number, since it is larger than the sum of its proper divisors (7769865).

54388999 is an equidigital number, since it uses as much as digits as its factorization.

54388999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7769864.

The product of its digits is 2799360, while the sum is 55.

The square root of 54388999 is about 7374.8897618880. The cubic root of 54388999 is about 378.8817517361.

The spelling of 54388999 in words is "fifty-four million, three hundred eighty-eight thousand, nine hundred ninety-nine".